Remove Reaction.users "Python 3.4 usage" section
Remove Reaction.users "Python 3.4 usage" section

Remove nonsensical "Python 3.4" usage section from Reaction.users().
Left behind from f25091ef.

Rapptz/discord.py,khazhyk/discord.py,rapptz/discord.py,Harmon758/discord.py,imayhaveborkedit/discord.py,Harmon758/discord.py